utomatic ynamic ncremental onlinear … default, the reactions are now saved to the porthole file...

ADINA R & D, Inc.

UTOMATIC

YNAMIC

NCREMENTAL

ONLINEAR

NALYSIS

Release Notes

ADINA 9.1 December 2015

ADINA System 9.1

Release Notes

(for version 9.1.3)

December 2015

ADINA R & D, Inc. 71 Elton Avenue

Watertown, MA 02472 USA

tel. (617) 926-5199 telefax (617) 926-0238

www.adina.com

Notices

ADINA R & D, Inc. owns both this software program system and its documentation. Both the program system and the documentation are copyrighted with all rights reserved by ADINA R & D, Inc.

The information contained in this document is subject to change without notice. ADINA R & D, Inc. makes no warranty whatsoever, expressed or implied that the Program and its documentation including any modifications or updates are free from errors or defects. In no event shall ADINA R&D, Inc. become liable to the User or any party for any loss, including but not limited to, loss of time, money or goodwill, which may arise from the use of the Program and its documentation including any modifications and updates.

Trademarks

ADINA is a registered trademark of K.J. Bathe / ADINA R & D, Inc.

All other product names are trademarks or registered trademarks of their respective owners.

Copyright Notice

© ADINA R & D, Inc. 2015 December 2015 Printing Printed in the USA

New and updated feature summary

ADINA System 9.1 Release Notes 3

New and updated feature summary This section lists the new and updated features that are available in ADINA System 9.1, as compared with ADINA System 9.0.7. There are new commands and new and changed parameters associated with the new and updated features. The release notes refer to the commands and parameters in the command-line formats. Further information about the new commands and new and changed parameters can be found in the AUI Command Reference Manuals. For user interface users, most command-line parameters have analogous fields in the dialog boxes. Note, when we refer to documentation, we refer to the versions of the documentation given below in the “Available Documentation” section.

Features for all programs Table of supported program versions

Platform Operating system Version ADINA-M Parallelized assembly1

Fortran compiler

Linux x86_642

2.6.18 and higher, glibc 2.5 and higher, gcc 4.1.2 and higher

64-bit Parasolid and Open Cascade

Yes Intel ifort 11.1

Windows x86_642

Windows XP, Vista, 7, 8

64-bit Parasolid and Open Cascade

Yes Intel Visual Fortran 11

1) All program versions have parallelized solvers. Only ADINA and ADINA-Thermal have parallelized assembly. 2) The Intel 64 and AMD Opteron implementations of the x86_64 architecture are supported. Improvements to the floating license option The ADINA System now uses Reprise License Manager (RLM) for the floating license option.

An option is now available to hold an AUI floating license for the entire analysis. This option is useful for analyses that require steered adaptive meshing (SAM) as it ensures an AUI floating license is always available for the adaptive meshing.


4 ADINA System 9.1 Release Notes

ADINA Handbook An ADINA Handbook is now available that covers geometry, meshing, and the fast graphics mode.

ADINA Solids & Structures features Improvements for fracture mechanics The station virtual shift (SVS) method is now available for fracture mechanics of 3-D crack models. This method has the following features:

• General mesh (mapped or free-form) everywhere, including at the crack fronts. • Mixed mode stress intensity factor calculations in linear elastic analysis for mode I, II and

III fracture using the method of auxiliary fields. • Energy release rate calculations for mode I. • More than one 3D crack can be modelled at a time. Only one ADINA-IN command is

required for each crack definition. • Virtual crack advance at crack advance stations, not necessarily at nodes. The advantage

is that as the mesh is refined, the number of crack advance stations on the crack front can be held constant, so the virtual crack advance is independent of the meshing.

• Shifting of nodes adjacent to the crack front to the quarter-points by option. • Various error measures output so that the user can assess the quality of the integrations

used in the calculated stress intensity factors. The 9.0 virtual shift method is now referred to as the nodal virtual shift (NVS) method. Chapter 10 of the ADINA Structures Theory and Modeling Guide is extensively rewritten. Command-line:

CRACK-SVS FRACTURE ... METHOD

Improvements to frequency analysis using the CMS method The number of eigenpairs “p” to be solved can now be different from the number of static constraint modes “r” and the number of fixed interface dynamic modes “s”. That is, the program now only solves for the eigenpairs “p” requested. This is useful for problems where p<<(r+s) as it significantly reduces the memory required and the CPU time. The CMS method can now use either the subspace method or the Lanczos method for solving the fixed interface modes.



Command-line: FREQUENCIES ... METHOD NFREQ-CMS

Energy calculations The energy associated with the whole model and with selected parts of the model can now be viewed as the solution progresses using the “Energy View” tab in the “ADINA Structures Solution Process” window. The energies can also be viewed after the solution is completed using the standalone “Energy View” utility, and the energies can be exported to a text file. The following energies are output: • Work done by external forces. • Kinetic energy. • Elastic and plastic strain energy. • Energy dissipated by Rayleigh damping and by concentrated dampers. • Energy stored by compliant contact. • Energy dissipated by frictional contact. • Energy dissipated by contact damping. • Energy balance. Currently, only the following is supported: • 2D solid elements, 3D solid elements, concentrated masses, and concentrated dampers. • 3D contact (2D contact is not supported). • The in-core memory allocation option IOPTIM=3 (the out-of-core memory allocation

option IOPTIM=2 is not supported). The following material models are supported: • Linear elastic and linear thermo-elastic, isotropic and orthotropic, material models. • Elastic-plastic, thermo-elastic-plastic, and creep material models. • Cam-clay and Mohr-Coulomb geotechnical material models. • Hyperelastic rubber models (viscoelastic and Mullins effect energy dissipation effects are

not supported). Command-line:

ENERGY Implicit dynamic analysis The Bathe method of time integration is the default in ADINA 9.1. This default applies to both implicit dynamic analysis, and also to low-speed dynamic analysis.



The Bathe method is now the default for the commands listed below. Command-line:

ANALYSIS DYNAMIC-DIRECT-INTEGRATION AUTOMATIC TIME-STEPPING AUTOMATIC TOTAL-LOAD-APPLICATION ANALYSIS-SWITCH TMC-CONTROL

Improvements to analysis-switch The ANALYSIS-SWITCH command now allows the program to automatically switch, without the need for a restart, between all analysis types at specified solution times or at no convergence. If the program switches the analysis type due to no convergence (e.g. from static to dynamic analysis), then the program switches back to the original analysis type after time TSWITCH. If TSWITCH=0.0, the program does not switch back. The ANALYSIS-SWITCH option can also be used to switch from static or dynamic analysis to frequency or linearized buckling (modal) analysis without the need for a restart. Command-line:

ANALYSIS-SWITCH ANALYSIS MODAL-TRANSIENT ... NSTEP DTSIZE

Improvements to automatic time-stepping The automatic time stepping (ATS) feature can now automatically switch from static to low-speed dynamic analysis, without the need for a restart, at no convergence. The program will then switch back to static analysis after time TSWITCH. If TSWITCH=0.0, the program does not switch back. Command-line:

AUTOMATIC TIME-STEPPING ... RESPS ... TSWITCH Improvements to automatic total load application The total load application (TLA) feature can now automatically switch from static to low-speed dynamic analysis, without the need for a restart, at no convergence. The program will then switch back to static analysis after time TSWITCH. If TSWITCH=0.0, the program does not switch back. Command-line:

AUTOMATIC TOTAL-LOAD-APPLICATION ... UNLOAD SWITCH TSWITCH



Improvements for reaction saving By default, the reactions are now saved to the porthole file when a Nastran file is imported into ADINA. Note, prior to ADINA 9.1, by default, no reactions were saved to the porthole file when a Nastran file was imported into ADINA. The REACTION and REACT-TOL parameters in the PORTHOLE command can now be used to control which reactions are saved to the porthole file. Note, prior to ADINA 9.1, reactions numerically close to zero were not saved to the porthole file. Command-line:

PORTHOLE ... REACTION REACT-TOL Eight-chain material model The eight-chain material model for rubber is implemented. The eight-chain model is similar to the Arruda-Boyce model; the difference is that the eight-chain model uses the exact Langevin function, whereas the Arruda-Boyce model uses an approximate series expansion of this function. Command-line:

MATERIAL EIGHT-CHAIN RUBBER-TABLE EIGHT-CHAIN

Improvements to Arruda-Boyce material model In the MATERIAL ARRUDA-BOYCE command, in version 9.0, the material constants MU, LAMDA, KAPPA have nonzero defaults. In version 9.1, these defaults have been removed. Command-line:

MATERIAL ARRUDA-BOYCE Bergström-Boyce material model for rubber viscoelasticity This material model is available for 3-D solid elements. This viscoelastic model is especially well suited for modeling the finite viscoelastic response of filled rubbers, nitrile rubbers, silicone rubbers, and other elastomers. See Section 3.8.2.2 of the ADINA Structures Theory and Modeling Guide for details. Command-line:

RUBBER-VISCOELASTIC BERGSTROM-BOYCE



Three-network model for polymers This material model is available for 3-D solid elements. The three-network model is especially well-suited for capturing the highly nonlinear and time-, temperature-, and load history dependent behaviors of synthetic polymers including Polytetrafluoroethylene (Teflon) and Polyethylene. See Section 3.17.5 of the ADINA Structures Theory and Modeling Guide for details. Command-line:

MATERIAL THREE-NETWORK Improvements to the DF-CONCRETE material Concrete-creep and concrete-shrinkage effects can be considered now using the DF-concrete material model. The input conditions and requirements for the concrete material can be selected either from the ACI209- 92 code or the CEB-FIP code. Command-line:

MATERIAL DF-CONCRETE DFC-CREEP ACI209R-92 DFC-CREEP CEB-FIP DFC-CREEP ADINA

Improvements for beam-bolt All four beam-bolt bending moments (2 moments at each local node) are now saved to the porthole file. Note, prior to ADINA 9.1, the beam-bolt results were saved only at beam local node 2. This is sufficient for the forces and torsion, but not for the bending moments since the bending moments vary along the beam length. Improvements to shell elements The death time can be specified in individual layers in composite shell elements. Command-line:

EDATA ... tdeath(i) Improvements for pressure loadings Pressure loads can now be defined about a local Cartesian coordinate system and about a cylindrical system. A spatial function for pressure loads can now be defined on body faces.



Command-line: LOAD PRESSURE ... SYSTEM

Improvements to initial conditions A rotational initial condition can now be defined with a specified initial angular velocity and rotation axis. Command-line:

INITIAL-ROTATION Improvements to ADINA-TMC Command-line:

TMC-CONTROL ... SUBCASE Improvements to glue meshing feature Shell elements can now be used in the glueing of 3D surfaces. The glued shell element faces can be triangles or quads, and they can have linear or quadratic displacement interpolations. For shell elements, only the translational DOF are glued (the rotational DOF are not glued). Also, only surface-to-surface glueing is supported (edge-to-surface glueing is not supported). Improvements to solution diagnostics The solution diagnostics settings can now be changed in a restart analysis. Improvement to universal file output ADINA universal file output now includes the plastic strain components.

ADINA Thermal & TMC features Improvements to the saving of heat conductivity and heat capacity matrices Nodal-based heat conductivity and heat capacity matrices can now be saved to the *.mtx file.



ADINA CFD & FSI features SMP for FCBI-C assemblages Shared Memory Parallelization (SMP) for FCBI-C assemblages is now supported. Therefore, in ADINA 9.1, both SMP and DMP solutions are supported for FCBI-C elements in all computational stages, including element assembly and the linear equation solvers. Improvements for low-speed compressible analysis The unknown temperatures for low-speed compressible flow for FCBI-C elements can now be solved using either the heat transfer equation or a new total energy equation: In the heat transfer equation (version 9.0) option, we solve for temperature using the non-conservative form of the energy equation. That is, we solve for:

( )vCt

ρ θ∂+

∂…

The heat transfer equation is robust, but is not always accurate. An example where the heat transfer equation is not accurate is quasi-static polytropic compression and expansion. In the total energy equation (new for version 9.1) option, we solve for temperature using the conservative form of the energy equation. That is, we solve for:

( )Et

ρ∂+

∂…

where 12vE C θ= + ⋅v v . The total energy equation is more accurate than the heat transfer

equation, but could be less stable at higher flow velocities. Command-line:

MASTER ... LS-TEMP-EQN Improvements to fluid-structure interaction "New" contact segments are now used for FSI analysis. This gives improved tractions, improved surface representation for curved surfaces, and more detailed contact output (i.e., contact gap, contact status, slip/stick velocities), as compared to the "old" contact segments. The ADINA Structures automatic time stepping (ATS) feature is now supported for the structural solution in iteratively coupled FSI analysis. When the ATS feature cuts back the



time step size during the structural iterations, the FSI forces acting on the structure are proportionally cut back. The ADINA Structures limiting displacements feature is now supported for direct FSI analysis. By default, checking is turned on for the structural convergence tolerances in direct FSI analysis. Command-line:

TOLERANCES FLUID-STRUCTURE ... STRUCTURE Improvements for thermal FSI Two-way thermal fluid-structure interaction (TFSI) analysis is now available through the standard FSI setting. This new method accounts for heat generation both in the structure and the fluid. That is, heat generation due to plastic deformation or viscous effects in the structure, and heat generation due to frictional contact are now accounted for in the two-way thermal FSI analysis. The old boundary thermal FSI option (BTFSI) has been replaced by this new method. Command-line:

MASTER ... THERMAL-FSI Improvements for wall boundary conditions A new wall boundary condition option, ALL-EXT=FREE, is now available. This option applies the wall boundary condition to all external boundaries where a velocity or pressure boundary condition has not been applied. This option can be used to change the default boundary condition to a wall. If this option is not used, the default boundary condition is zero traction. Command-line:

BOUNDARY-CONDITION WALL ... ALL-EXT=FREE Improvements for gap boundary conditions The wave equation is now used with the gap condition for FCBI-C elements to improve convergence when the gap changes status from open to closed. Improvements to the sliding mesh and periodic condition for FCBI-C elements The sliding mesh boundary condition and the periodic boundary condition have been improved for FCBI-C elements to enhance the conservations of the flux (mass, momentum, heat, etc.) across the paired meshes. This improvement includes rigid motion boundary flux



since it is always associated with sliding mesh. Improvements for leader-followers A new leader-follower option, TYPE=CONE, is now available for FCBI-C elements. In this new option, the follower is located on the wall or slipping boundary at the locally closest location to the leader within a conical search domain. The leader associated with its normal to the boundary defines the apex of the conical domain and the cone angle is a user-specified variable. Note that in the leader-follower option TYPE=CLOSEST, the follower is located on the wall or slipping boundary at the locally closest location to the leader anywhere within the domain. Command-line:

LEADER-FOLLOWER ... LFTYPE ANGLE Improvements to adaptive mesh generation The sweep vector [DX, DY, DZ] for swept adaptive meshing can now be specified using the DX, DY, and DZ parameters in the ADP-CONTROL and ADP-MESH commands. Command-line:

ADP-CONTROL ... DX DY DZ ADP-MESH

AUI features

User interface improvements New icon, General toolbar

• A Select icon is now available in the General toolbar. This allows users to select a model entity (geometry, element, etc.) and then right-click to obtain options associated with that selection. For example, if the user right-clicks with the Select icon active on geometry, subdivision and meshing options are given. Clicking the spacebar toggles between the Pick icon and the Select icon.

New icons, Display toolbar

• Show Fluid Structure Boundary .

• Show Glue Mesh .

• Split Zone



New icons, Results toolbar

• Clear Reaction Plot .

• Create Reaction Plot

• Modify Reaction Plot .

• Quick Reaction Plot . Note that for the Windows version, the toolbars must first be reset to display the new icons. For example, to reset the “Display” toolbar, choose View→Customize, click on the “Display” text to highlight the field and click Reset. Improvements to the model tree The following are now displayed in the model tree: • Node sets, element sets, element-edge sets, and element-face sets. • Skew systems, orthotropic axis systems, and coordinate systems. • Leader-followers and SAM settings.

The following improvements have been made to the model tree: • The text of selected categories in the model tree can be modified through the right-click

menu (rename) on the tree view or using the “Description” field in the respect dialog box. The text is either appended or overwritten, as follows:

Element Group (append) Materials (append) Contact Group (overwrite) Contact Surface (overwrite) Node Set (overwrite) Element Set (overwrite) Element face-set (overwrite) Element edge-set (overwrite)

For example, assume that element group 1 is a 3D solid element group with description “Engine Casing”. The model tree in this case now displays:

3D-Solid: Engine Casing

• Zones can be made active through the right-click menu on the tree view. • The ordering of the zones is now in ascending numerical order. • Multiple entries in the model tree can be now deleted through the right-click menu on the

tree view with shift (or Ctrl) select.



Vector pick button A vector pick button is now available to automatically define vector entries in the dialog boxes. The vector is defined by picking either 2 or 3 points. If 2 points are selected, the vector is from the first to the second point. If 3 points are selected, the vector is normal to the plane defined by the 3 points whose normal follows the right-hand screw rule. Right-click menu for mesh plots Right-clicking on a mesh plot gives a menu that lists options associated with the mesh plot. Improvements to input and session files In version 9.0, the session file contains all parameters of each command. In version 9.1, the session file either contains all parameters of each command, or only contains the parameters that are changed in the execution of each command. The default is to contain all parameters of each command (as in version 9.0). For a data input table in the session file, either the entire table is written, or only the modified rows of the table are written. In version 9.0, the entire table is written when the number of rows of the data input table is less than 100. In version 9.1, the threshold number of rows can be specified (default = 100, as in version 9.0). Command-line:

CONTROL ... SESSIONOPTION SESSIONTABLE Undo level The undo level has now been increased to 20 (from 5 in version 9.0). Command-line:

CONTROL ... UNDO Improvements to the dialog boxes The following dialog boxes have been improved:

Mesh Faces and Mesh Bodies: The meshing dialog boxes have been redesigned to make them more intuitive and easier to use. Apply Fixity: The geometry for each specific fixity is now defined separately. This improves the work flow for large models, and makes the “Apply Fixity” dialog box consistent with the “Apply Load” dialog box.



Glue Mesh: The master and slave surfaces are now defined separately and they are now highlighted. Delete Contact Mesh: The contact mesh associated to geometry can now be deleted from any contact group and any contact surface. The contact group and contact surface does not need to be explicitly specified. Define Time Step: The total step number and the total solution time is now given at the end of each time block (row). Define Rigid Links: Multiple slave edges/faces on multiple bodies can now be defined, and the master and slave surfaces are now highlighted. Also, the DISPLACEMENTS parameter is now exposed. Define Geometry Domain: The geometry type is now automatically determined by the AUI and does not need to be manually specified by the user. Rayleigh Damping Factors: The “Factor, Beta” column for stiffness-proportional damping is now greyed out when the central difference method is used. Solution Process: The obsolete ADINA Structures equation solvers are now removed from the “Solutions Process” dialog box (unless they are selected through command line mode, in which case they are displayed). Iterative Solver Settings: The obsolete ADINA Structures iterative solver settings are now removed from the “3D Iterative Solver” dialog box. Leader-Follower Constraints: The leader-follower points are now highlighted when selected. SBC dialog box: For 3D analysis, the “Define Special Boundary Condition” dialog box now initialises with the “Apply to” field equal to “Faces/Surfaces” for all boundary condition types. Miscellaneous Options: All obsolete fields in the “Miscellaneous Options” dialog box for ADINA CFD are now removed. Define Load Render Depiction: There is now an “All Plot On” button and an “All Plot Off” button. Environment Settings: The environment settings dialog box has been redesigned. The “Version” field is no longer exposed. Define Band Table Depiction: The layout of the define band table depiction has been changed such that the “Maximum” fields are always directly above the corresponding



“Minimum” fields. Define Zone: The “Object” and “Keyword” fields have been removed.

Model definition Import of ANSYS files Ansys .cdb data files can now be directly imported into the ADINA-IN database. Only node, element, and element-face set import is supported. The following ANSYS elements are supported: • SHELL181 • SOLID185 • SOLID186 • SOLID187 • MESH200 The following commands in the .cdb data files are supported: • ET • NBLOCK • EBLOCK • SFE Command-line:

IMPORT-EXTERNAL Improvements to warning messages for Parasolid import The AUI now issues a warning message if the Parasolid geometry is invalid on import. Improvements for geometry point creation Geometry points can now be created: • Between two points or nodes, P1 and P2. The created geometry points are either equally

spaced between P1 and P2 or at a specified parametric location. • At the center of a circle defined by P1, P2, and P3. • At nodes.

Command-line:

POINT BETWEEN



POINT CENTER POINT NODE

Improvements to ADINA-M: Geometry points and body edges created by the user (using SPLIT-EDGE, SPLIT-FACE, BODY PROJECT, etc.) can now be removed from bodies using BODY DELETE-ENTRY. Existing ADINA-M bodies can now be duplicated to create a new general ADINA-M body that is a copy of the existing ADINA-M body. Multiple faces on multiple bodies can now be selected for body sweep and body revolve. Sheet bodies can now be created from multiple faces on multiple bodies. Command-line:

BODY REMOVE-ENTITY BODY DUPLICATE BODY SHEET ... MERGE-SHEET MERGE-IMPRINT DELETE-BODY BODY SWEEP ... FACE BODY MERGE BODY REVOLVED ... MODE FACE BODY MERGE

Improvements in STL definition and meshing Command-line:

CONVERT-STL STL ELIM-EDGE STL ELIM-EDGES-ANGLE

New all-brick mesher A new all-brick mesher is now available. This method is based on the method outlined in the below paper. L. Maréchal, “Advances in Octree-Based All-Hexahedral Mesh Generation: Handling Sharp Features”, Proceedings of the 18th International Meshing Roundtable, 65-84, 2009 Command-line:

BHEXA Improvement for input of parameters for Bathe method of direct time integration (ADINA Structures) The DELTA-BATHE and ALPHA-BATHE parameters in the ANALYSIS DYNAMIC-DIRECT-INTEGRATION command are now used to specify the Newmark coefficients in the



first substep in the Bathe method. This avoids confusing with the existing parameters ALPHA and DELTA in the ANALYSIS DYNAMIC-DIRECT-INTEGRATION command Command-line:

ANALYSIS DYNAMC ... BATHE-DELTA BATHE-ALPHA Ability to move elements from one group to another 2D solid elements, 3D solid elements, and shell elements can be moved from one element group to another element group, provided no geometry, loads, boundary conditions, etc. are associated with the elements that are moved. For example, elements can be moved from the 2D solid axisymmetric group to the 2D solid generalized plane stress (membrane) group. This is useful when importing a mesh from a third party software program. Command-line:

ELMOVE Ability to split and join meshes Coincident nodes can be equivalenced using MESH-JOIN. MESH-JOIN can also be used to find coincident nodes between parts of the model without joining them. Parts of the model can be detached using MESH-DETACH by splitting any node that is shared between the parts. MESH-DETACH can also be used to find shared nodes between parts of the model without splitting them. The mesh can also be split about an interface using MESH-SPLIT. Several options are available for splitting the nodes that lie on the boundaries of the interface. MESH-SPLIT can be useful to create a crack face. Command-line:

MESH-SPLIT MESH-DETACH MESH-JOIN

Improvements for boundary condition application Fixity conditions can be applied to lines/edges (TWO-D) or surfaces/faces (THREE-D) in a single command. Command-line:

FIXBOUNDARY TWO-D FIXBOUNDARY THREE-D



Improvements for node set definitions Multiple element groups can now be selected when defining node sets from an element group. Improvements for element set definitions Element sets can now be defined in the following ways: • From element groups. • From a given zone. • From elements attached to selected nodes. • From elements adjacent (that share nodes) to selected elements. • From elements attached to selected elements. • From geometry lines or body edges. The elements whose element-edges lie on the

geometry line or body edge are selected, respectively. • From geometry surfaces or body faces. The elements whose element-faces lie on the

geometry surface or body face are selected, respectively. • From geometry volumes or bodies. The elements associated with the geometry volume or

body are selected, respectively. • By merging element sets. • By subtracting from the TARGET element set the element sets selected. • By obtaining the intersection of all element sets selected. Command-line:

ELEMENTSET ... OPTION ZONE TARGET Improvements for element face-set definitions Multiple element groups can now be selected when defining element-face sets from an element group. The default auto-chaining face angle is now 20 degrees (the default was 0 degrees in version 9.0). Improvements for rigid link definitions The slave surface of a rigid link can now be defined on multiple edges/faces of multiple bodies. Command-line:

RIGIDLINK ... slavebody(i)



Improvements to load application For ADINA Structures, pressure loading on element-face sets can reference a geometry surface to specify a spatial variation of the pressure. Note that this feature was already available in version 9.0 for pressure loading on geometry faces. For ADINA CFD, normal traction loading on geometry faces and element-face sets can reference a geometry surface to specify a spatial variation of the normal traction. Command-line:

APPLY-LOAD ... gref(i) (for ADINA CFD) Improvements to contact input In 2D contact, the contact surface can now be defined on multiple edges of multiple bodies. In 3D contact, the contact surface can now be defined on all faces of multiple bodies (not just one body). Command-line:

CONTACT-CONTROL ... POSTIMPACT CONTACTSURFACE ... SOLID CSDELETE TWO-D CSDELETE THREE-D

Improvements to element group splitting PPROCESS is now obsolete and EGCONTROL is used to split the element groups into smaller subgroups. By default, the number of subgroups generated for each element group is 8. Command-line:

PPROCESS Improvements for sweeping / revolving meshes of 2D fluid elements A 2D-fluid “mesh only” element group is now available to allow 2D elements to be defined in general 3D space in ADINA-CFD. This is needed for sweeping/revolving meshes in ADINA-CFD and for the swept adaptive re-meshing (swept-SAM). Note that 2D-axisymmetric fluid elements and 2D-planar fluid elements must always lie in the YZ-plane. Command-line:

EGROUP TWODFLUID ... SUBTYPE=2DMESH



Improvements to boundary layer meshing Boundary layer meshes can now be applied across sharp corners, where the boundary layer thickness is larger than the element thickness. Improvements for body meshing Command-line:

GBODY ... DANGMAXC Model display and post-processing Fast graphics mode The fast graphics mode (FGM) is available for Linux computers, as well as for Windows computers. For more information, see the ADINA Handbook. Improvements for porthole loading The porthole loading of multiple files has now been improved. Now the first file in the sequence can be selected and the AUI will open either all the files in the sequence or a specified number of files in the sequence. This is especially helpful for loading steered adaptive mesh (SAM) results. Command-line:

LOADPORTHOLE ... OPERATION=AUTOMATIC SEQFILE Splitting zones A zone can be split into two zones using a cutting plane. Command-line:

SPLITZONE Summed forces and moments from ADINA Structures The resultant force and the resultant moment acting on any section through the structure can now be computed by summation of the nodal point forces, provided the nodal point forces are saved to the porthole file. All elements are supported, except 2D fluid and 3D fluid elements. For full details, see the notes at the end of the ELFORCEPOINT command description in the Display Processing command reference manual.



Command-line: ELFORCEPOINT.

Support of SVS fracture The following commands are added or modified to support the SVS fracture feature of version 9.1. New command: Command-line:

VSINFO Modified commands: Command-line:

VSDEPICTION VSPOINT VSCOMBINATION VSLINE

Merging files into the list file A text file can be inserted into the list file using the DUMPLIST command. Command-line:

DUMPLIST Improvements to particle tracing Particle tracing now works for steered adaptive mesh (SAM) results. Improvements for mesh plots ADINA-M geometries: The Parasolid curve angle in surface depiction and the Parasolid chord angle in line depiction are now both set to 0.05 (from 0.1). This improves the depiction of curved edges/faces. FSI boundaries: The line thickness of FSI boundaries in ADINA Structures has been reduced, and a light yellow color (#FFFF80) is used.



Skew system symbols: The skew systems symbol is redesigned. An arrow now points along in the A-direction and the arrowhead lies in the A-B plane. Note that the right-hand screw rule can also be used to determine the B- and C-directions. The Skew System Plot icon appears as

follows: Improvements to mass flux resultant variables For FCBI elements, the VOLUME_FLUX_SURFACE resultant variable is no longer displayed, because MASS_FLUX_ELFACE should be used instead.

Update to the ADINA Verification Manual



B.131 3D Three-Network small punch test Objective

To demonstrate ADINA’s Three-Network viscoelastic material model implementation.

Physical problem

A small, disc-shaped specimen of ultra-high molecular weight polyethylene (UHMWPE) is subjected to the testing protocol described by ASTM standard F2183-02 [1]. A hemispherical head punch is driven into contact with the specimen, which is constrained within a die. As the punch displaces, it deforms the specimen (see Figure 1, below). The punch force and the displacement are measured during the experiment.

Figure 1. Schema illustrating the experimental setup and punching sequence. Quarter-symmetry can be assumed. Note the specimen (green) being deformed as the punch (red) displaces upwards. The die (purple) constrains the specimen's motion.

Finite element model

The geometry is divided into three parts: the specimen, the die, and the punch. Both the punch’s and the specimen’s geometry are defined using ADINA’s



Parasolid kernel. Contact, with friction, is modeled between the punch and the specimen, and the die and the specimen. Rigid links are used to prescribe the displacement of the punch’s surface. The die’s surface is modeled as a rigid contact surface. Mechanical parameters for the viscoelastic Three-network material model are taken from Bergstrom and Bischoff (2010) [2]. Due to symmetry, only one quarter of the test is modeled. This 3-dimensional quarter-symmetric model consists of a 1401-element brick-dominated mixed mesh of high-order elements. A prescribed displacement at a rate of 0.5mm/min is prescribed for the punch. 120 load steps with duration of 4s are defined. Automatic time stepping (ATS) is used to aid convergence.

Solution results

The force displacement results predicted by ADINA are in very good agreement with the published experimental data [2].

References [1] ASTM F2183-02(2008), Standard Test Method for Small Punch Testing of Ultra-

High Molecular Weight Polyethylene Used in Surgical Implants, ASTM International, West Conshohocken, PA, 2008.

[2] J.S. Bergström and J.E. Bischoff, “An Advanced Thermomechanical Constitutive

Model for UHMWPE,” Int. J. Struct. Changes Sol., Vol. 2, pp 31–39, 2010.

Available documentation


Available documentation The following documents are available with the ADINA System. These documents are modified in this release of the ADINA System as described below. Notice that report numbers are no longer used. Installation Notes Describes the installation of the ADINA System on your computer. Depending on the platform, the appropriate installation notes in pdf format can be printed or downloaded from http://www.adina.com. ADINA Handbook This handbook is added in version 9.1. Written as a task-oriented desktop reference, the ADINA Handbook helps users to quickly and effectively leverage ADINA's advanced geometric modeling, meshing, and visualization features. ADINA User Interface Command Reference Manual

Volume I: ADINA Solids & Structures Model Definition Volume II: ADINA Thermal Model Definition Volume III: ADINA CFD & FSI Model Definition Volume IV: ADINA EM Model Definition Volume V: Display Processing

Updates are made for the new and updated commands. ADINA Primer Problem instructions are revised for the ADINA System 9.1. Theory and Modeling Guide

Volume I: ADINA Solids & Structures Volume II: ADINA Thermal Volume III: ADINA CFD&FSI Volume IV: ADINA EM

The new features of the solution programs are described.

Available documentation


ADINA Verification Manual ADINA-Nastran Interface Manual TRANSOR for I-DEAS Users Guide TRANSOR for Femap Users Guide

utomatic ynamic ncremental onlinear … default, the reactions are now saved to the porthole file...

Documents